Luminaire

ABSTRACT

A luminaire has a glass globe which is supported between a cover for the luminaire and elongated supporting arms. The luminaire support has a sleeve member upon which the cover is slidably mounted for vertical movement. The support arms are pivotally mounted at equally spaced intervals about the sleeve member. The supporting arms and the cover are connected such that when the cover is raised the arms pivot upwardly to release the globe.

United States Patent [72] Inventors Hans Bunte Halingen; Horst Traulich; Herbert Vedder, Menden, Germany [21] Appl. No. 701,950

[22] Filed Jan. 31, 1968 [45] Patented Jan. 19, 1971 [73] Assignee Firma Gantenbrink-Leuchten ol-IG Spezialfabrik Iuer Aussenleuchten Menden, Germany [54] LUMINAIRE 9 Claims, 4 Drawing Figs.

- [52] U.S. CI 240/128, 240/147, 240/150 [51] Int. Cl F21v 17/06 [50] Field of Search 240/128,

[56] References Cited UNITED STATES PATENTS 449,712 4/1891 Stephansky 240/144 1,022,875 4/1912 Robb 240/128 1,604,830 10/1926 Hull 240/128X FOREIGN PATENTS 550,386 10/1956 Italy 240/128 Primary Examiner-John M. Horan Assistant ExaminerMonroe H. Hayes Attorney-Otto John Munz ABSTRACT: A luminaire has a glass globe which is supported between a cover for the luminaire and elongated supporting arms. The Iuminaire support has a sleeve member upon which the cover is slidably mounted for vertical movement. The sup port arms are pivotally mounted at equally spaced intervals about the sleeve member. The supporting arms and the cover are connected such that when the cover is raised the arms pivot upwardly to release the globe.

. ENT EDP ANIQIQYI 3557.863

sum-1 or 4 FIG! Horst Truulich 8: Herbert Vedder ATTORNEY Pam-3N1mmism sum 3 or 4 Hans Bdnte Horst Traullch 8: Herbert Vedder ATTORNEY .PATENTEDMNISISYI 3557.363

. SHEEI t 0F 4 mumg Hans Bunte HOI'Q'TIOUHCha Herbert Vedder ATTORNEY LUMINAIRE DESCRIPTION OF THE PRIOR ART Luminaires are known having luminaire glass with a retracting glass rim resting on a three-point suspension with upwardly pivotable radial support arms, which arms are supported in the holding position, and can be covered with its luminaire lid, which latter can be displaced in the upward direction.

. SUMMARY OF THE INVENTION In the prior art luminaires, difficulties are encountered when removing the luminaire glass, since the supporting arms are positioned in the interior of the luminaire glass and are difficult to reach even when detaching the luminaire lid. The upwardpivoting of the supporting arms is therefore cumbersome. Tools may be required and handling the luminaire during installation of the glass requires both hands of the installer. The situation is aggravated further-when hand-blown glass is used which has irregularities in the thickness of the rim and in the symmetry thereof.

In accordance with the present invention, the luminaire glass with the retracted glass rim rests on three upwardly pivotable radial support arms which are supported in the holding position and can be closed off by an upwardly displaceable luminaire lid. Each support arm is connected with the luminaire lid by a guide member in such a manner that, by shifting the luminaire lid upwardly, the holding arms are pivoted upwardly for removing the luminaire glass. The hinged connection between the guide member and the support arm has a certain amount of play, whereby means are provided to permit that the luminaire lid can be lifted somewhat without pivoting the support arms upwardly. The support arms are mounted at a cast bushing with the aid of a resilient ring. Lugs are cast integrally with the bushing, the resilient ring passing through the lateral grooves of these lugs, and the support arms being pivotable in the longitudinal grooves of these lugs. These I grooves are continued in the longitudinal grooves of the bush- The guide members are guided in the support arms in oblong slotted holes and are held at the luminaire lid in fishplate tongues punched out of the luminaire lid and'rolled up. The guide members have an angular shape.

The bushing and the luminaire lid are arranged on agube receiving the electrical; cables and carrying the lamp socket,

and can be fixed by clamping screws.

There is a play between the rim of the luminaire lid and the rim of the luminaire glass to provide' means to shift the luminaire glass for weight balancing purposes.

The luminaire glass can readily be attached by one hand, the glass is pushed upwardly; the support arms pivot automatically upwardly, and then fall downwardly again as soon as the opening of the luminaire glass is positioned higher than the supportarms. Then, the luminaire glass can be placed onto the support arms.

Such luminaires with a so-called three-point suspension for the luminaire glass have proven to be suitable particularly in case of hand-blown glasses wherein larger tolerances due to differing wall thicknesses must be compensated for.

Particularly in case of heavy glasses, such a possibility of compensation is important. Therefore, the support arms have an inclined upper edge facilitating the weight balancing process, since when the luminaire glass is displaced, the luminaire glass rim is likewise lifted or lowered. The support arms are so long that they extend underneath the rim of the luminaire glass in any position of displacement, and to release it.

' The procedure of inserting the luminaire glass is repeated in reversed order of steps. There is a spacing between the rim of the luminaire lid and the rim of the luminaire glass so that the luminaire glass is displaceable for balancing the weight of the luminaire.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, like reference characters designate same or equivalent parts throughout the several views.

FIG. I is a perspective view of the luminaire with a luminaire glass mounted thereon shown in section;

FIG. 2 shows the luminaire with the luminaire lid pulled upwardly and the supporting arms pivoted toward the top;

FIG. 3 is a plan view of the bushing with the support arms hingedly connected thereto; and

FIG. 4 is a section along line H of FIG. 3 through the embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIGS. land 2 show a bushing 2 and a luminaire lid 14 displaceably arranged on a sleeve 1. The luminaire cover lid 14 and the bushings 2 and 15 can be affixed with clamping screws 3 and 16, respectively. Three lugs 7 are cast laterally at and integrally with the bushing 2. They have a lateral groove 8 wherein a resilient ring 5 is positioned. The support arms 4 are guided in longitudinal grooves 9 of the lugs 7, which grooves continue in the longitudinal grooves 19 of the bushing 2. The support arms 4 are provided with holes 6 through which the resilient ring 5 passes. Accordingly, the support arms 4 are pivotable upwardly and rest on the bushing 2 in the radial supporting position. Guide members 11 connect the pivotable support arms 4 with the luminaire lid 14. There is a spacing 13 between the rim of the luminaire lid 14 and the rim of the luminaire glass so that the luminaire glass 20 is easily displaceable for balancing the weight of the luminaire. The guide members 11 are guided in the support arms in oblong holes 10 and are rotatably held in fishplates 12, which plates are partially punched out of the luminaire lid 14 and bent. The punched out perforations simultaneously serve as ventilating means. The lamp socket 18 is arranged at the lower end of the sleeve 1. The sleeve 1 holds in its interior the electrical cables 17.

The hinged connection between the guide member 11 and the support arm 4 has a play in such a manner that the luminaire lid 14 can be lifted a certain distance without the necessity of pivoting the support arms 4 upwardly. This play is necessary to permit first pulling off the luminaire lid from the raised vertically positioned rim of the luminaire glass 20 and thereafter to pivot the support arms upwardly in order to remove the luminaire glass. The angle of the upper edge 'of the support arms 4 to the perpendicular of the rod as shown in FIGS. 1 and 4 is drawn to scale and proportions to the thickness of the rim of the glass.

It should be understood that the foregoing relates to only a preferred embodiment of the invention and that it is intended to cover all changes and modifications of the example of the invention herein chosen for the purposes of the disclosure, which do not depart from the spirit and scope of the invention as claimed hereinafter.

We claim:

1. A luminaire comprising a suspended support means including an elongated sleeve member, a cover lid slidably mounted on said support means and having a downwardly extending rim portion, a glass member having an upstanding rim portion positioned adjacent said rim portion of said cover lid, at least three elongated support arms having inner ends mounted equidistantly spaced around said sleeve member, each of said support arms having an outer end for clamping said rim portion of said glass member between said rim portion of said cover lid and said outer end, and guide means having a flexible hinge means for pivotally connecting said support arms with said cover lid, whereupon in a movement of 3. A luminaire as claimed in claim 1, said guide members have an angular shape.

4. A luminaire as claimed in claim 1, wherein said sleeve member is a hollow suspension sleeve with at least a portion of electrical circuitry mounted therein, a lamp socket mounted to its lower end with said glass member surrounding it, and said bushing and said socket are attached to said sleeve by clamping screws.

5. A luminaire as claimed in claim 1, wherein the upper edge of said arms are inclined in a closed position at a slight angle from perpendicular to the sleeve member to facilitate shifting and lifting said glass member to better balance its weight.

6. A luminaire as claimed in claim I, and further comprises a cast bushing mounted on the said sleeve member, and said support arms are mounted to said bushing with the aid of a resilient ring. I

7. A luminaire as claimed in claim 6. and further comprises lugs on the said bushing. lateral grooves between said sleeve member and said lugs, longitudinal grooves of the said lugs and longitudinal grooves in the said bushing forming a continuation of said grooves of said lugs. holes in the-said arms, said resilient ring threaded through said holes to surround said sleeve and mounted within said lateral grooves to permit pivoting of said arms.

8. A luminaire as claimed in claim I, wherein said hinge means comprises a pluiali ty of fishplates equidistantly spaced ins-aid cover lid and a plurality of oblong guide slots in said support arms, one end of each of said guide members being pivotably connected with said fishplate and'the other end with said guide slot.

9. A luminaire as claimed in claim 8, said flshplates are partially punched outof said cover lid and serving simultaneously as ventilating means. 

1. A luminaire comprising a suspended support means including an elongated sleeve member, a cover lid slidably mounted on said support means and having a downwardly extending rim portion, a glass membEr having an upstanding rim portion positioned adjacent said rim portion of said cover lid, at least three elongated support arms having inner ends mounted equidistantly spaced around said sleeve member, each of said support arms having an outer end for clamping said rim portion of said glass member between said rim portion of said cover lid and said outer end, and guide means having a flexible hinge means for pivotally connecting said support arms with said cover lid, whereupon in a movement of said cover lid upwardly, said support arms are pivoted vertically upwardly for the removal of said glass member, and in a lesser movement of said cover lid upwardly, said cover lid may be lifted without pivoting said support arms in the vertically upwardly position.
 2. A luminaire as claimed in claim 1, wherein said rim portions of said cover lid and of said glass member are spaced from each other in a clamping position sufficiently to permit shifting of the glass member to balance its weight.
 3. A luminaire as claimed in claim 1, said guide members have an angular shape.
 4. A luminaire as claimed in claim 1, wherein said sleeve member is a hollow suspension sleeve with at least a portion of electrical circuitry mounted therein, a lamp socket mounted to its lower end with said glass member surrounding it, and said bushing and said socket are attached to said sleeve by clamping screws.
 5. A luminaire as claimed in claim 1, wherein the upper edge of said arms are inclined in a closed position at a slight angle from perpendicular to the sleeve member to facilitate shifting and lifting said glass member to better balance its weight.
 6. A luminaire as claimed in claim 1, and further comprises a cast bushing mounted on the said sleeve member, and said support arms are mounted to said bushing with the aid of a resilient ring.
 7. A luminaire as claimed in claim 6, and further comprises lugs on the said bushing, lateral grooves between said sleeve member and said lugs, longitudinal grooves of the said lugs and longitudinal grooves in the said bushing forming a continuation of said grooves of said lugs, holes in the said arms, said resilient ring threaded through said holes to surround said sleeve and mounted within said lateral grooves to permit pivoting of said arms.
 8. A luminaire as claimed in claim 1, wherein said hinge means comprises a plurality of fishplates equidistantly spaced in said cover lid and a plurality of oblong guide slots in said support arms, one end of each of said guide members being pivotably connected with said fishplate and the other end with said guide slot.
 9. A luminaire as claimed in claim 8, said fishplates are partially punched out of said cover lid and serving simultaneously as ventilating means. 